Add XDEBUG_MODE=coverage for executing PHPUnit

[peter279k]

Overview

• Adding the XDEBUG_MODE=coverage to fix warning message:

Warning:       XDEBUG_MODE=coverage or xdebug.mode=coverage has to be set

[danon]

Thank you very much for contribution!

But I'm buffled. The tests currently aren't run by xdebug in tarivs, so wouldn't the XDEBUG_MODE flag be ignored?

Second of all, the coverage is being generated as we speak, look: https://coveralls.io/github/T-Regx/T-Regx?branch=master :)There's even a coverage badge in the ReadMe.md.

[peter279k]

• It seems that the warning message is generated when executing the PHPUnit 9.x version.

I'm going to close this PR as you say this warning message can be ignored at this moment :).

[danon]

@peter279k I just said I didn't see the reasons behind it. If as you say, there's a reason for that flag, just like PhpUnit warning suggested, maybe it's worth adding.

Did you hear about it from this link: sebastianbergmann/php-code-coverage#834 ?

[peter279k]

Just notice that the PHPUnit can support two different approaches about coverage.

One is the XDebug and another one is pcov.

If the current PHP version supports and enables pcov extension, it will not print above warning message.